package Collection;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

public class ListDemo {
    public static void main(String[] args) {
        List<String>list=new ArrayList<>();
        list.add("one");
        list.add("two");
        list.add("three");
        list.add("four");
        list.add("five");
        list.add("one");
        System.out.println("list:"+list);
        String e=list.get(2);
        System.out.println(e);
        Iterator<String> it = list.iterator();

        while (it.hasNext()){
            System.out.println(it.next());
        }

        for(String s:list){
            System.out.println(s);
        }
        String old=list.set(2,"six");
        System.out.println("list："+list);
        System.out.println(old);
        //list .set(2,"six")
        String s=list.remove(2);
        System.out.println("list:"+list);
        System.out.println(s);
         list.add(3,"seven");
        System.out.println(list);




    }
}










